摘要
结合条纹和随机图案投影的优点,提出了一种基于条纹投影相移和伪随机图案相结合的三维成像方法。所提方法仅需投影四幅等步相移的正弦条纹图和一幅伪随机结构光图案,结合极线约束条件和图像相关技术,建立左右两相机折叠相位的相互对应关系,在相互对应的折叠相位中,用相位值作为编码来实现双目对应匹配,故不需要对折叠相位进行展开便可实现三维重建。实验结果表明,与传统方法相比,所提方法减少了图像序列采集时间,其三维重建结果的致密性、稳健性以及精度都未受影响。
A new three-dimensional （3D） imaging method that combines both fringe projection and pseudorandom pattern projection technique is presented. In proposed approach, we only need to project four equal-step phase-shift images and a pseudorandom pattern image. Combined with the epipolar constraint and image correlation, the congruent relationship of the wrapped phase between left and right cameras is obtained. In each corresponding folding phase, the phase values as coding can implement the binocular matching, so 3D reconstruction can be realized without phase unwrapping. The experimental results show that the proposed method can reduce the time of image sequence acquisition, comparing with conventional fringe projection technique. In addition, the compactness, robustness and accuracy of 3D image have not been affected.
出处
《中国激光》
EI
CAS
CSCD
北大核心
2014年第2期155-161,共7页
Chinese Journal of Lasers
基金
国家自然科学基金(61377017
61201355)
关键词
机器视觉
条纹分析
数字图像相关
对应点匹配
machine vision
fringe analysis
digital image correlation
matching corresponding points
